Raised and trained by a cult of plane-hopping scaled dwarves, vault serpents are tenacious and deadly guardians. Once an area is set as its home (either naturally or via pheromone paints developed by the dwarves), a vault serpent will defend it to the death against any and all intruders, leaving only if absolutely necessary for food and water. While not technically immortal, vault serpents are exceptionally long-lived, remaining in or near their home areas for millennia as long as sustenance is available. Instinct: Devour intruders in its home

• Lock someone or something in its coils
• Inflict hallucinatory poison